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EP 4 122 203 A1

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(43) Date of publication: 25.01.2023 Bulletin 2023/04 (21) Application number: 21771954.1 (22) Date of filing: 19.03.2021

(51) International Patent Classification (IPC):  H04N 19/527(2014.01) H04N 19/513(2014.01) H04N 19/176(2014.01) H04N 19/70(2014.01) H04N 19/157(2014.01) (52) Cooperative Patent Classification (CPC): H04N 19/52; H04N 19/54 (86) International application number: PCT/US2021/023115 (87) International publication number: WO 2021/188876 (23.09.2021 Gazette 2021/38)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 20.03.2020 US 202062992704 P (71) Applicant: Beijing Dajia Internet Information Technology Co., Ltd. Beijing 100085 (CN)	(72) Inventors: CHEN, Wei Beijing 100085 (CN) XIU, Xiaoyu Beijing 100085 (CN) CHEN, Yi-Wen Beijing 100085 (CN) MA, Tsung-Chuan Beijing 100085 (CN) JHU, Hong-Jheng Haidian District 100085 (CN) WANG, Xianglin Beijing 100085 (CN) YU, Bing Beijing 100085 (CN) (74) Representative: Gesthuysen Patentanwälte  Huyssenallee 100 45128 Essen 45128 Essen (DE)